On a turbulent 'spot' in a laminar boundary layer.

I. Wygnanski, M. Sokolov, D. Friedman

Research output: Research - peer-reviewArticle

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Abstract

Artificially initiated turbulent spots in a Blasius boundary layer were investigated experimentally using hot-wire anemometers. Electrical discharges generated the spots, which grew in all directions as they were swept downstream by the mean flow. A typical lateral spread angle of the spots is 10SUP to each side of the plane of symmetry. Conditional sampling methods were used to form ensemble-averaged date yielding the average shape of a spot and the mean flow field in its vicinity. Far downstream a spot exhibits conical similarity and all quantities measured seem to be independent of the type of disturbances which generated the spot in the first place. (from authors abstract)

LanguageEnglish (US)
Pages785-819
Number of pages35
JournalJournal of Fluid Mechanics
Volume78
Issue number4 , Dec. 22, 1976, 1976
StatePublished - 1800
Externally publishedYes

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Laminar boundary layer
Anemometers
Flow fields
Boundary layers
Wire
Sampling
laminar boundary layer
hot-wire anemometers
boundary layers
flow distribution
disturbances
sampling
symmetry

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

Wygnanski, I., Sokolov, M., & Friedman, D. (1800). On a turbulent 'spot' in a laminar boundary layer. Journal of Fluid Mechanics, 78(4 , Dec. 22, 1976, 1976), 785-819.

On a turbulent 'spot' in a laminar boundary layer. / Wygnanski, I.; Sokolov, M.; Friedman, D.

In: Journal of Fluid Mechanics, Vol. 78, No. 4 , Dec. 22, 1976, 1976, 1800, p. 785-819.

Research output: Research - peer-reviewArticle

Wygnanski, I, Sokolov, M & Friedman, D 1800, 'On a turbulent 'spot' in a laminar boundary layer.' Journal of Fluid Mechanics, vol 78, no. 4 , Dec. 22, 1976, 1976, pp. 785-819.
Wygnanski I, Sokolov M, Friedman D. On a turbulent 'spot' in a laminar boundary layer. Journal of Fluid Mechanics. 1800;78(4 , Dec. 22, 1976, 1976):785-819.
Wygnanski, I. ; Sokolov, M. ; Friedman, D./ On a turbulent 'spot' in a laminar boundary layer.In: Journal of Fluid Mechanics. 1800 ; Vol. 78, No. 4 , Dec. 22, 1976, 1976. pp. 785-819
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